551946521 has 16 divisors (see below), whose sum is σ = 645605376. Its totient is φ = 462033936.

The previous prime is 551946509. The next prime is 551946529. The reversal of 551946521 is 125649155.

It is not a de Polignac number, because 551946521 - 2⁶ = 551946457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551946529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178430 + ... + 181496.

It is an arithmetic number, because the mean of its divisors is an integer number (40350336).

Almost surely, 2^551946521 is an apocalyptic number.

It is an amenable number.

551946521 is a deficient number, since it is larger than the sum of its proper divisors (93658855).

551946521 is a wasteful number, since it uses less digits than its factorization.

551946521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668.

The product of its digits is 54000, while the sum is 38.

The square root of 551946521 is about 23493.5421126743. The cubic root of 551946521 is about 820.2866938235.

The spelling of 551946521 in words is "five hundred fifty-one million, nine hundred forty-six thousand, five hundred twenty-one".